Cutting cylinder



.July 27, i937., L. s. scHuLLo CUTTING. CYLINDER Filed Dec. 3. 1934 2 Sheets-Sheet l 752 Je?? fo r.' Zozzz's 6I cizzZZO,

Gj/ee July 27, 1937. f 1., s. SCHILLO 2,088,118

CUTTING CYLINDER Filed Dec. 3, 1934 2 Sheets-Shc-zeI 2 Patented July 27, 1937 UNI-TED STATES PATENT OFFICE CUTTING CYLINDER Application December 3, 1934, Serial No. 755,715

3 Claims.

This invention relates to improvements in cutting cylinders and refers specically to a cylinder for cutting roofing shingle blanks or the like, which are commercially known as strip shingles, from a continuously advancing web of relativel flexible roofing material. Y i

The utility, objects and advantages of my invention will be apparent from the accompanying drawings and following detail description.

In the drawings, Fig. 1 is an elevational View, partly in section, of a shingle cutting cylinder comprising the concepts of my invention.

Fig 2 is an enlarged sectional view taken on the line 2 2 of Fig. 1.

Fig. 3 is an enlarged detailed sectional view taken on line 3 3 of Fig. 1.

Fig. 4 is a top plan view of toggle washer utilized to maintain the cutting knives in place. Fig. 5 is a sectional view taken on line 5 5 of Fig. 4.

Fig. 6 is a fragmentary top plan view of a strip shingle cut by my cutter cylinder.

Fig. 7 is an elevational view, partly in section, of a modification of my invention.

Fig. 8 is an enlarged sectional view taken on line 8 3 of Fig. '7.

Referring in detail to the drawings, I indicates generally a shingle cutting cylinder adapted to cut a continuously advancing web of relatively exibleroofing material into shingle blanks commercially referred to as strip shingles. It is to beunderstood, however, that although my invention is particularly adaptable for cutting strip shingles, the same may also be used to cut other classes of flexible, brous or fabric webs. Consequently, although for purposes of illustrating and describing my invention, reference will be made to cutting roofing shingle strips, it is not to be limited thereto.

The cutting cylinder I comprises a metal tube 2, the surface of which adjacent each end, may be ground to provide a bearing surface as at 3 and il. Bearings and 6 may be respectively mounted upon portions 3 and 4 of tube 2, said bearing being supportedinany suitable manner (not shown). Bearings 5 `and B-may be provided with grease or oil openings 'I and 8 respectively, whereby the bearing surfaces may be lubricated. A spur gear 9 shown in dotted lines, may

be keyed to one end of tube 2 whereby said tube may be rotated in bearings 5 and 6, the keyway lll being shown in full lines.

A metal sleeve or jacket II'may be immovably mounted, as by shrinking or in another like manner, uponv the central portion of tube 2 between adapted to out a web transversely. Knives I8 bearing surfaces 3 and 4, said sleeve, as will be hereinafter more fully described, being adapted to carry the cutting knives.

In cutting cylinders of this general character, the knives used therewith are removably mounted 5 upon the sleeve surface, so that the same may be replaced when broken or sharpened when dull. In some instances the sleeve is so constructed that one cutting cylinder may sever a web so as to form a limited number of different patterns. 10 In general, the mode of mounting the knives upon the sleeve comprises providing a plurality of appropriately located grooves in the sleeve surface, mounting the knives in the grooves and by means of suitable blocks, wedging the knives soY mounted. 15

In the present instance, grooves IZ, I3, I4, I5,

IS and I1 may be provided in the surface of sleeve II. Longitudinally disposed knives (not shown) may be mounted in grooves I2 and I3, being and I9, mounted respectively in grooves I4 and 2O II, may cut the web longitudinally and knife 20 mounted in groove I5 may cut a short transverse slit.

One mountingarrangement which may be used is described in conjunction with groove I5 and knife 20. This manner of mounting may be used with all of the remaining knives. A block 2l may be positioned in groove I5 at one side of knife 2li, said block being finely y secured in place by countersunk screws 22 or the like. A second block 23, having cut out portions 24, may be mounted in groove I5 upon the opposite side of knife 2D. Apertures 25, registering with the out out portions 24 may be provided in a defining wall 35 of groove I5, and screws 25 may be threadedly engaged in the body of the sleeve, said screws being positioned in the larger apertures formed by the cut out portions 24 and apertures 25. A hollow frustro-com'cal toggle washer ZI may be po- 40 sitioned beneath head 2B of each of the screws 26, said washer being provided with radial slots 29.

-The arrangement is such that when screws 26 are brought home, heads 2B bear upon the tops of washers 2l causing the lower portions thereof to 45 spring or expand thereby forcing block 23 toward knife 2li, and firmly wedge said knife in place.

In the cutting of webs to form cut articles of ,desired patterns, it is frequently desirable that a web is severed longitudinally by a circular knie 32, iii or lil. Apertures S3 are cut across the line of severance by means of complementary U-shaped knives Sal or 35. Knives 34 and 35 may be constructed in the form of an integral U, or each oi U-shaped portions may comprise two symmetrical halves ci the U. In either case the knives 34 and 35 may be positioned in grooves E8 and respectively, said knives being nrmly wedged said grooves by means of blocks 3l and 38 respectively, said blocks being held in place by blocks 2l and 23, or similar blocks insertable in grooves l?. and i3.

In thus cutting a flexible web, difficulty has been encountered in disposing oi the cut out portion removed from apertures 33. When the web is thus out the cut out portions being of an area which is defined by the blade of the knives, is greater than the area defined by the shank or body of the knife and, consequently, when the knife is driven through the thickness of the material, the cut out portion is wedged within the enclosure formed by the knife.

My invention is particularly directed to a means which may be utilized in conjunction with a cutting cylinder for positively removing such cutouts.

A shaft 39 may be disposed longitudinally within tube 2, said shaft being eccentric with respect to the axis of said tube. Shaft 39 may be maintained stationary, the ends of said shaft being keyed to a stationary portion of the cutting machine, for instance said shaft may be rigidly secured to a member 45, which, in turn, may be rigid with respect to bearing 5. A similar arrangement may obtain at the opposite end of shaft 39, but for the sake of expcditing the description the same is not shown. Disks i l having diameters equal to the internal Idiameter of tube 2, may be rigidly mounted upon shaft said disks being spaced from each other. Sleeve 42 may be loosely positioned upon shaft 39 and may be confined between the disks 4l. A similar arrangement (not shown) may be mounted upon shaft 39 beneath knives 34, or wherever a portion of the web is adapted to be removed.

In the embodiment of my invention shown, blades or knives 3ft and 35 for cutting apertures 33 may be circumferentially spaced on the cylinder by angles of 90 so that four sets of apertures 33 may be cut in said web per revolution of the cylinder. A block 43 may be slidably positioned between each of the knives 34 and 35 which denne the apertures to be cut in the web and each of said blocks may be secured to the upper end of a pin or plunger 44. Apertures 45 may be provided in the walls of tube 2, each or said apertures connecting into a counter-bore 58 provided in the walls of sleeve l l. Pins or plungers may extend into apertures [l5 and counterbores 45, the inner ends oi said pins being substantially the same in diameter as that oi the apertures l5 whereby said apertures serve as guides for said pins. rThose portions of pins fili which normally extend into counter-bores are oi restricted diameters with respect to the inner ends oi the pins.

A washer 4i-l may be positioned upon each of the pins .14 at the inner portions of counter-bores 4S, said washers serving as abutments for coil springs $22. rEhe opposite ends of coil springs d8 may bear against washer 49. Packing material may be confined between washer [i9 and washer lil, said latter washer being normally maintained at the bases of knives 5,5 by means of the impelling force of springs 48. The inner ends of pins 44 are normally maintained in contact with sleeve i2 under the influence of springs 42.

In operation, cutting cylinder i, comprising a portion of a cutting machine (not shown) may be mounted immediately beneath a bed roll (not shown), said bed roll and said cylinder being geared together in order that their peripheral speeds be maintained equal. The web to be operated upon is threaded between the cutting cylinder and bed roll and is thereby cut in the desir/ed pattern. It can readily be seen that when a set of knives is in its uppermost position, that is, when it is in the act of cutting, blocks [s3 and pins 44 associated with said knife and acting under the iniiuence of springs 8 are in their retracted position. When apertures 33 are thus out, the cut out portions remain wedged between knives 35. As cylinder I rotates, sleeve 62 mounted upon eccentrically positioned shaft 39, forces pins 44 outwardly against the force of springs 4S. When the knives in question reach their lowermost position, pins 4 associated with said knives have acted to move blocks 43 to such a position as to protrude beyond the edges of the knives thus ejecting the out out portions of the web previously coniined between the knives. As the cylinder continues its rotation, blocks 43 are again retracted under the influence of springs 48.

If the line of osculation of the bed roli and 5' cutting cylinder occurs at a place other than the top of the cutting cylinder, the eccentric shaft 39 is disposed at an eccentric position within tube 2 diametrically opposite to the line of osculation.

To reduce friction and prolong the life of the moving parts comprising the ejecting mechanism, space 52 may be lled with grease or other lubricant.

Referring particularly to Figs. 7 and 8, a modication of my invention is shown wherein 53 indicates a cutting cylinder as a whole. The cylinder 53, unlike cylinder I, comprises a unitary tube or drum 54 having ends 55 of restricted diameter.

Many of the parts of drum 54 are similar to those shown in cylinder l and to facilitate the description thereof said similar parts, without further description, will be designated with corresponding primed numerals.

In this form of my invention drum 54 may be supported by bearings 5 and 6 and in turn said bearings are secured to stationary caps 55 at each end of the drum. As indicated, caps 56 are immovable with respect to bearings 5 and 6' and are secured to a fixed portion of the frame (not shown) of the cutting machine. Caps 55 serve to support an eccentrically positioned inner shaft 51 which is provided with ends 58 of reduced diameter. Ball bearings 59 are disposed in races Gti which are supported by caps 55 and consequently shaft 51 although immovable laterally or axially, is free to rotate about its own longitudinal axis. Consequently, pins 44 instead of riding upon the surface of a sleeve similar to sleeve 42, ride directly upon the eccentric shaft 5l and blocks 43 are thereby reciprocated radially when drum 54 rotates.

Although my invention is particularly adaptable for use in cutting strip shingles or other web-like roofing material it is to be understood that the same may be utilized for other purposes. For instance, the roll may be utilized to stamp out plastic designs such as the cutting of composition tile or the like. In this case the portions of the plastic composition material which were conned Within the apertures deiined by the knives would be'the desired product. Broadly, my invention contemplates an improved means for ejecting a cut-out regardless of its composition or constitution and for whatever purposes the cut-out may be used.

I claim as my invention:

1. A cutting cylinder comprising in combination a hollow rotatable cylinder, bearings in which the ends of said cylinder are journalled, a laterally stationary'shaft of circular cross-section eccentrically positioned within said cylinder, frictionless bearings carried by the cylinder bearings in which the ends of said eccentric shaft are journalled whereby said shaft is free to rotate about its longitudinal axis, a series of knives mounted upon the surface of said cylinder delining a series of totally enclosed areas, said areas being axially spaced with respect to the cylinder, blocks mounted within said knife-dened areas, a pin secured to each'of said blocks and extending through radial apertures provided in said cylinder, a spring urging the end of each of said pins into Vdirect contact with said eccentric shaft whereby said pins constantly ride upon said shaft to radially reciprocate said block within said area when the cylinder is rotated about its axis.

2. An apparatus for cuttingV roong elements from a sheet oli asphaltic roong material ccmprising a cylinder, journal bearings for said cylinder, knives mounted on said cylinder to sever successive shingle elements from the sheet, a plurality of series of cutting blades mounted on said cylinder, said series being spaced from each other axially of the cylinder, each of said series of blades being arranged to cut a waste piece from said sheet conjointly with the severance of the shingle element by said iirst mentioned knives and means Vfor ejecting the waste pieces from between the blades of each series, said means comprising radial passageways extending from the surface of the cylinder to the interior thereof and in alignment with each of said series of blades, a reciprocable plunger mounted in each of said passageways, a member eccentrically mounted within said cylinder, said member being rotatable about its longitudinal axis, said plunger being adapted toconstantly ride upon said eccentrically mounted member whereby upon rotation of said cylinder said plunge-rs are forced outward radially to eject the waste pieces lodged between each series of blades.

3. An apparatus for cutting rooiing elements from arslieet of asphaltic roong material comprisinga cylinder, journal bearings for said cylinder, knives mounted on said cylinder to sever successive shingle elements from the sheet, a plurality of series of cutting blades mounted on said cylinder, said series being spaced from each other axially of the cylinder, each of said series of blades being .arranged to cut a waste piece from said sheet conjointly with the severance of the shingle. element by said rst mentioned knives and means for ejecting the waste pieces from between the blades of each series, said means comprising radial passageways extending from the surface oi the cylinder to the interior thereof and in alignment with each of said series of blades, a reciprocable plunger mounted in each ci said passageways, a rotatable shaft eccentrically mounted within said cylinder, bearings supporting said shaft at each end thereof, said bearings being carried by the cylinder journal bearings, said plungers being adapted to constantly ride upon said eccentric shaft whereby upon rotation o1 said cylinder said plungers are forced outwardly to eject the waste pieces lodged between each series of blades.

LOUIS C. SCI-ELLO. 

